* {
    margin: 0;
    padding: 0;
    /*box-sizing: border-box;
    z-index: 0;*/
}

/*
html, body {
    height: 100%;
}
*/

body {
    background-color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.options {
    padding: 20px;
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.button, input {
    height: 30px;
    padding: 0 20px;
}

.color {
    padding: 0 20px;
    width: 100px;
    margin: 0 40px;
}

.container {
    --size: 8;
    /*background-color: #000;*/
    width: 1000px;
    height: 1000px;
    display: grid;
    grid-template-columns: repeat(var(--size), 0fr);
    grid-template-rows: repeat(var(--size), 0fr);
    gap: 3px;
    /*padding: 3px;*/
}


.box {
    background-color: #393939;
    /*border-radius: 2px;*/
}

svg {
    overflow: visible; /*make routing lines show across borders of cells*/
    z-index: 3;
}